The silhouette coefficient, which ranges from –1 to 1, is widely used for this purpose — a score closer to 1 means that the clusters are well defined. The Dunn index calculates the ratio between the smallest distance between observations not in the same cluster (inter-cluster distance) and...
“Camino ghosts” byJohn Grisham(+): this is a legal thriller linked to Grisham’s character Bruce Cable (a bookshop owner and old books collector in South Florida) with an old lady author descendant of African slaves as the centre of the plot (Lovely Jackson) and an enchanted little islan...
To understand how real-time PCR works, we illustrate a qPCR analysis using a typical amplification plot (Figure 1). In this plot, the number of PCR cycles is shown on the x-axis, and the fluorescence from the amplification reaction, which is proportional to the amount of amplified product ...
These figures are at best educated guesses, but according to most sources iridium is the clear winner. It occurs at about three-tenths of a part per billion, a ratio similar to that of a grain of salt to a Clydesdale, making it about twelve times as rare as gold. World’s only ...
If the angular sensor is tracking another gear than that having a cracked tooth, then vibrations due to the cracked tooth will be at the order component equal to the gear ratio (or speed ratio) between the tracked gear and the gear having the cracked tooth. For example, if the gear wit...
You have determined that Layton's information ratio is .60. What must Layton's tracking error be relative to its benchmark? (Enter your answer as Xy^2 ? y^3 = 7, find y? y? = ... Population replacement level is: A. the rate of positive population growth. B. the rate of...
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airborne chlorides, or where a longer service life is required, a lower water-to-binder ratio is usually prescribed. Fig. 3 (left) illustrates the impact of varying the w/b ratio in the lower range of w/b ratios. However, we should keep in mind that a lower w/b ratio typically ...
The Pearson coefficient is a type ofcorrelation coefficientthat represents the relationship between two variables that are measured on the same interval or ratio scale. The Pearson coefficient is a measure of the strength of the association between two continuous variables. Understanding the Pearson Coef...
Thecontribution marginis part of the formula used to determine the breakeven point of sales. By dividing the total fixed costs by the contribution margin ratio, the breakeven point of sales—in terms of total dollars—may be calculated.